I got a sidekick lx but it came without a memory card so I'm wondering how much it costs, what type do I get and where can I get it. I am using T-mobile and also a question on the side.

The worker who got me this phone said I would be unable to remove my SIM card from the phone for a month or else I would be charged 200$. Does this mean that I am unable to remove it even to put in a SD card?